Question

Какова роль корневых волосков ??? что такое корневое давления ?

Answer 1

1.Корневые волоски значительно увеличивают всасывающую поверхность, разветвляясь и глубоко проникая в почву. Площадь соприкосновения возрастает.
2. Корневое давление - сила, вызывающая одностороннюю подачу влаги от корней к побегам.

Answer 2

Role of Root Hairs

Root hairs are tiny, elongated outgrowths that emerge from the epidermal cells of plant roots. They play a crucial role in the absorption of water and nutrients from the soil. Here are some key points about the role of root hairs:

1. Increased Surface Area: Root hairs greatly increase the surface area of the root system, allowing for more efficient absorption of water and nutrients from the soil. 2. Water Absorption: The main function of root hairs is to absorb water from the soil. They create a large surface area for water to enter the root system through osmosis. 3. Nutrient Absorption: Root hairs also facilitate the uptake of essential nutrients, such as nitrogen, phosphorus, and potassium, from the soil. These nutrients are necessary for plant growth and development. 4. Anchoring: In addition to their role in absorption, root hairs help anchor the plant in the soil, providing stability and preventing soil erosion.

Root Pressure

Root pressure refers to the force exerted by the roots of plants that pushes water and dissolved nutrients upwards through the xylem vessels. Here are some key points about root pressure:

1. Mechanism: Root pressure is primarily driven by osmosis and active transport processes in the root cells. The movement of water and solutes into the root creates a higher solute concentration, resulting in the movement of water from the soil into the root. 2. Transport of Water and Nutrients: Root pressure helps transport water and dissolved nutrients from the roots to the rest of the plant, especially in herbaceous plants and during periods of high soil moisture. 3. Limited Role: While root pressure contributes to the movement of water in plants, it is not the main mechanism responsible for long-distance water transport. Instead, the main driving force for water movement in plants is transpiration, which is the loss of water vapor through the leaves.

It's important to note that the role of root hairs and root pressure can vary depending on the plant species and environmental conditions. Different plants have adapted different strategies for water and nutrient uptake, and the significance of root hairs and root pressure may differ accordingly.

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